一种提高地震信号方位角估算质量的偏振分析法

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英文篇名：A Modified Polarization Analysis Approach for Improving the Quality of Azimuth Estimation 中文刊名：核电子学与探测技术 英文刊名：Nuclear Electronics & Detection Technology 作者：李健 ; 王晓明 ; 石建芳 ; 邱宏茂 ; 王娟 英文作者：LI Jian ; WANG Xiao-ming ; SHI Jian-fang ; QIU Hong-mao ; WANG Juan ; CTBT Beijing National Data Center ; School of Electronic Engineering ; Beijing University of Post and Telecommunication 中文关键词：偏振分析 ; 方位角估算 ; 协方差矩阵 英文关键词：polarization ; azimuth estimation ; covariance matrix 出版日期：2014-08-20 机构：禁核试北京国家数据中心;北京邮电大学电子工程学院; 年：2014 期：08 出版单位：核电子学与探测技术

摘要

为了提高三分向台站方位角计算的准确性,结合DRSN软件处理方法的思想,在原有采用固定频带滤波后进行偏振分析的基础上增加了信号检测频带,选择最佳结果作为偏振分析结果。测试结果表明:该方法提高了能量分布在较窄频带的震相和分布于较高频带的区域震相的偏振分析质量,有效改善了方位角估算的准确性;对于方位角残差不具备正态分布的台站,其结果没有改善。
Polarization analysis is used on 3-Component stations data to estimate the azimuth and slowness at CTBT Bei Jing NDC.In order to improve the quality of azimuth estimation,in this work,polarization analysis was conducted in the detection filter band in addition to the original fixed band.The testing shows the method effectively enhanced the quality of polarization analysis for arrivals with energy only covering a narrow frequency and for regional arrivals located in a higher frequency band.The accuracy of the azimuths estimation was improved.The new approach was not effective for stations without normal distribution of azimuth residuals.

引文

[1]CTBTO International Data Centre.IDC Processing of Seismic,Hydro-acoustic,and Infrasonic Data[R].IDC Document IDC-5.2.1,2001.
    [2]Jurkevics A.Polarization analysis of three-component array data[J].Bull Seism Soc Am,1988,78(5):1725~1743.
    [3]朱光明.垂直地震剖面法[M].北京:石油工业出版社,1988.
    [4]黄中玉,高林等.三分量数据的偏振分析及其应用[J].石油物探,1996,35(2):9-16.
    [5]刘烨.VSP三分量时变偏振分析方法研究[D].长安大学硕士学位论文,2009
    [6]CTBTO International Data Centre.Detection and Feature Extraction[R].IDC Document,IDC-7.1.1,2001.